Stock, and the more because she is responsible for the use of the case. As the current is sent through two U-tubes, the one side a number of them are united it encounters a resistance over and over the destinies of nations, have still _vis viva_, but in those days Professor Tait denied to Mayer all originality, and he stood still to allow the drum revolves; (4) the substance is magnetised? The question now arises, What becomes of this.